— ventricosus, vi, 267.f
— verrucosus, vi, 123f; xiii, 360; xiv, 281.
Unionidæ, notice of I. Lea's memoir on, xxii, 169; xxvii, 371.
*— of the country of the Iguanodon, G. A. Mantell, xlvii, 402.f
Unios, D. H. Barnes's reclamation of, xiii, 358.
—, remarks on some, xxxii, 256.
—, habits of some species, of Ohio, S. P. Hildreth, xxxi, 62.
Valvata pupoidea, xxxviii, 196.
— sincera, xl, 267.
*Venerupis subvexa, xxiii, 342.